*{
    margin: 0;
    padding: 0;
}
body{
    /* 从左到右渐变 */
    background: linear-gradient(to right , #ed6aa0,#ec8c69);
    height: 100vh;
}

.menu-toggler{
    position: absolute;
    display: block;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    width: 40px;
    height: 40px;
    z-index: 2;
    /* 设置 div 元素的不透明级别 */
    opacity: 0;
    cursor: pointer;
}

/* :hover选择鼠标指针浮动在其上的元素，并设置其样式 */
.menu-toggler:hover + label,
.menu-toggler:hover + label::before,
.menu-toggler:hover + label::after{
    background: #fff;
}

.menu-toggler:checked + label{
    /* 透明背景，也就是去掉了被
    如果一个元素覆盖在另外一个元素之上，而你想显示下面的元素，
    这时你就需要把上面这个元素的background设置为transparent */
    background: transparent;
}

.menu-toggler:checked + label::before,
.menu-toggler:checked + label::after{
    top: 0;
    width: 40px;
    transform-origin: 50% 50%;
}

.menu-toggler:checked + label::before{
    transform: rotate(45deg);
}

.menu-toggler:checked + label::after{
    transform: rotate(-45deg);
}

.menu-toggler:checked ~ ul .menu-item{
    opacity: 1;
}


.menu-toggler:checked ~ ul .menu-item:nth-child(1){
    /* transform旋转 div 元素 */
    transform: rotate(0deg) translateX(-110px);
}

.menu-toggler:checked ~ ul .menu-item:nth-child(2){
    /* transform旋转 div 元素 */
    transform: rotate(60deg) translateX(-110px);
}

.menu-toggler:checked ~ ul .menu-item:nth-child(3){
    /* transform旋转 div 元素 */
    transform: rotate(120deg) translateX(-110px);
}

.menu-toggler:checked ~ ul .menu-item:nth-child(4){
    /* transform旋转 div 元素 */
    transform: rotate(180deg) translateX(-110px);
}

.menu-toggler:checked ~ ul .menu-item:nth-child(5){
    /* transform旋转 div 元素 */
    transform: rotate(240deg) translateX(-110px);
}

.menu-toggler:checked ~ ul .menu-item:nth-child(6){
    /* transform旋转 div 元素 */
    transform: rotate(300deg) translateX(-110px);
}

.menu-toggler:checked ~ ul .menu-item a{
    pointer-events: auto;
}

.menu-toggler + label {
    width: 40px;
    height: 5px;
    display: block;
    z-index: 1;
    border-radius: 2.5px;
    background: rgba(255, 255, 255,0.7);
    transition: transform 0.5s, top 0.5s;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
}

.menu-toggler + label::before,
.menu-toggler + label::after{
    width: 40px;
    height: 5px;
    display: block;
    z-index: 1;
    border-radius: 2.5px;
    background: rgba(255, 255, 255,0.7);
    transition: transform 0.5s,top 0.5s;
    content: "";
    position: absolute;
    left: 0;
}

.menu-toggler + label::before{
    top: 10px;
}

.menu-toggler + label::after{
    top: -10px;
}

.menu-item:nth-child(1) a{
    transform: rotate(0deg);
}

.menu-item:nth-child(2) a{
    transform: rotate(-60deg);
}

.menu-item:nth-child(3) a{
    transform: rotate(-120deg);
}

.menu-item:nth-child(4) a{
    transform: rotate(-180deg);
}

.menu-item:nth-child(5) a{
    transform: rotate(-240deg);
}

.menu-item:nth-child(6) a{
    transform: rotate(-30deg);
}

.menu-item{
    position: absolute;
    display: block;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    width: 80px;
    height: 80px;
    opacity: 0;
    transition: 0.5s;
}


.menu-item a{
    /* 此元素将显示为块级元素，
    此元素前后会带有换行符。 */
    display: block;
    /* 浏览器会将父盒子的宽度赋值给他*/
    width: inherit;
    height: inherit;
    line-height: 80px;
    color: rgba(255, 255, 255,0.7);
    background: rgba(255, 255, 255,0.2);
    border-radius: 50%;
    text-align: center;
    /* 把a标签的下划线去掉 */
    text-decoration: none;
    font-size: 40px;
    /* pointer-events 属性定义元素是否对指针事件做出反应 */
    pointer-events: none;
    transition: 0.2s;
}

.menu-item a:hover{
    box-shadow: 0 0 0 2px rgba(255, 255, 255,0.3);
    color: #fff;
    background: rgba(255, 255, 255,0.3);
    font-size: 45px;
}
